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首页> 外文期刊>Environmental Science & Technology >Effects of Cake Collapse Caused by Deposition of Fractal Aggregates on Pressure Drop during Ceramic Filtration
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Effects of Cake Collapse Caused by Deposition of Fractal Aggregates on Pressure Drop during Ceramic Filtration

机译：分形团聚体沉积引起的饼坍塌对陶瓷过滤过程中压降的影响

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摘要

A cake collapse model was developed by taking the combined effects of fractal dimension, relaxation ratio, coordination number, and aggregate diameter into consideration. The cake porosity including intraaggregate and inter-aggregate porosities was modeled successively by three typical coordination numbers (« = 6, 8, and 12). Accordingly, an inversion method made it possible to deduce the coordination number using the measured cake porosities, and the reverse-calculated value with minimum error and the corresponding relaxation ratios were applied as the parameters for the model. As a result, the profiles of intraaggregate and interaggregate porosities and cake porosity were respectively predicted in contrast to the integrated variation of the relaxation ratio and the fractal dimension. Furthermore, a comparison between the model predictions of the cake pressure drop gradients with and without aggregate compression was conducted to validate the presence of cake collapse. The results show that the predictions based on the proposed collapse model are in agreement with the experiments, and the coordination number is one of the key factors that must be incorporated into the cake collapse models.
机译：通过考虑分形维数，弛豫比，配位数和聚集体直径的综合影响，开发了蛋糕坍塌模型。通过三个典型的配位数（«= 6、8和12）依次对包括内部聚集体和内部聚集体的滤饼孔隙度进行建模。因此，通过反演方法，可以利用所测量的滤饼孔隙率来推导配位数，并且将具有最小误差的反向计算值和相应的松弛率用作模型的参数。结果，与松弛率和分形维数的整体变化相反，分别预测了聚集体内部和聚集体之间的孔隙度和饼状孔隙度的分布。此外，在有和没有骨料压缩的情况下，对滤饼压降梯度的模型预测进行了比较，以验证滤饼塌陷的存在。结果表明，基于崩溃模型的预测结果与实验结果吻合，并且协调数是蛋糕崩溃模型必须考虑的关键因素之一。

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  • 来源
    《Environmental Science & Technology》 |2011年第10期|p.4415-4421|共7页
  • 作者

    Wei Zhang; Cai-Ting Li; Xian-Xun Wei; Hong-Liang Gao; Qing-Bo Wen; Xiao-Peng Fan; Xin Shu; Guang-Ming Zeng; Wei Wei; Yun-Bo Zhai; Yi-De He; Shan-Hong Li;

  • 作者单位

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China,Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082,P.R. China;

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China,Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082,P.R. China;

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China,Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082,P.R. China;

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China,Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082,P.R. China;

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China,Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082,P.R. China;

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China;

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China,Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082,P.R. China;

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China,Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082,P.R. China;

    Guangzhou Hanhua Architects & Engineers Ltd, Guangzhou 510655, P.R- China;

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China,Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082,P.R. China;

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China,Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082,P.R. China,Department of Analytical and Environmental Chemistry, Humboldt University of Berlin, Berlin D-10099, Germany;

    College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R- China,Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082,P.R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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